JPH0459595A - Rail cramping device - Google Patents

Abstract

PURPOSE:To obtain a compact, secure, and strong rail grasping force by providing a holder furnishing a pair of holding members opposing to both side surfaces of the head of a rail, and clamp bodies positioning between the holding members of the holder and the side surfaces of the head of the rail, being held by the above holder, so as to generate or release a wedging force. CONSTITUTION:When the position of a crane is fixed, a hydraulic cylinder 22 is made in the expanding condition, and pins 11 are raised. As a result, a pair of clamp bodies 2a and 2a, and, 2b and 2b, provided at both sides of a rail 1 respectively, are contacted to the side surfaces of the rail by the holding members 3a and 3b of a holder 3. In this case, the clamp bodies 2a and 2b receive a wedging force between the holding surfaces with the holder 3, they are pressed to the side surfaces of the head of the rail 1 to grasp the head, and the cramping force is increased to fix the crane securely. When the crane is moved, the hydraulic cylinder 22 is operated to the contraction side, and the pins 11 are moved to the lowered position. As a result, the cramp bodies 2a and 2a, and, 2b and 2b, are separated each other against the force of rings 4, the crane can now run freely, and the device can be made in an extremely compact size.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rail clamp device for reliably stopping a crane on a crane travel rail when the crane stops traveling.

[Conventional technology]

As this type of device, a clamping device is known that is connected to a crane and is provided on a frame supported by wheels running on a crane travel rail. Such clamping devices include, for example, those disclosed in FIGS. 4 and 5 of the accompanying drawings.

In the figure, a frame 10 of the above device is supported by wheels 9 on a crane running rail l, and a pin 14
It is connected to a part of the crane 13 via the crane 13, and is configured to travel or stop traveling together with the crane 13. The frame 10 has levers 16a and 16b that can be opened and closed using the pin 15 as a lever, and by gripping the side surface of the head of the rail 1 with the tips (lower ends) of the levers 16a and 16b, the crane 13 This is to fix the position of.

The above mechanism in which the levers 16a and 16b grip the side of the rail has a weight 23 at the tip of a lever 21 that is swingable via a pin 24 attached to the frame 10.
1, one end of the lever 20 is attached via a pin 25 provided in the middle part of the lever 18a, the other end of the lever 20 is connected to the pin 19, and the lever 18a is attached by extending left and right from the pin 19.
, 18b constitute a toggle mechanism, and the levers 18a and 18b are connected to the gripping levers 16a and 16b, respectively, by pins 17a and 17b. In this configuration, when the lever 20 pulls down the pin 19 due to the weight of the weight 23, the tips of the levers 16a and 16b touch the rail 1.
The position of the crane is fixed by grasping the side of the crane.

To release the levers 16a and 16b from the gripping state, the weight 23 is pushed up by extending the hydraulic jack 22 that connects the pin 27 provided at the intermediate part of the lever 21 and the pin 26 on the frame 10. This is done by pushing upward. Hydraulic pressure for the hydraulic jack 22 is generated by a hydraulic unit 28 mounted on the frame 10.

Conventionally, in addition to the above-mentioned device, a lever 2 as a replacement for the weight 23 has also been used.
1 and the frame 10, or remove the weight 23 and the above-mentioned spring, increase the capacity of the hydraulic jack 23, and use it as a drive source for the lever 24.

[Problem to be solved by the invention]

However, the conventional device described above has a pair of levers 16a.
The position of the crane is fixed by gripping the side of the head of the rail using levers 16a and 16b, and in order to obtain strong gripping force, the distance between pin 15 of levers 16a and 16b and pins 17a and 16b is lengthened and a large It is necessary to gain leverage. Furthermore, in order to increase the load acting on the lever 20, the lever 21 to which the weight 23 is attached is lengthened, which increases the size of the entire device, so it cannot be used in cases where installation space is limited.

Furthermore, in addition to this, each lever, especially the lever 16a,
Since a large bending moment acts on the parts 16b, 21, etc., they must have a large cross section and be made of strong material, which is economically disadvantageous.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the conventional devices described above and to provide a rail clamping device that is compact and capable of obtaining a reliable and strong rail gripping force.

[Means to solve the problem]

According to the present invention, the above object is as follows: In a rail clamp device provided on a frame connected to a crane and supported by wheels running on a crane running rail, a pair of support parts facing both sides of the head of the rail are provided. and a clamp body located between each support part of the holder and the side surface of the rail head and held by the holder, and the support parts and the clamp body of the holder are fixed to the holder when the crane stops traveling. The clamp body is formed with an inclined engagement surface that generates a wedge force that presses the clamp body against the side surface of the rail head when the crane tries to move along the rail. (This is achieved by connecting a release means for separating the clamp body from the side surface of the rail head.

[Function] According to the present invention, when the crane is about to move when the crane is stopped, the gap between the support part of the holder held in the frame integrated with the crane and the clamp body is reduced. A wedge force is applied to the clamp body, which strongly grips the side surface of the rail head, preventing the above movement and fixing the position of the crane. The wedge force acts no matter which direction the crane attempts to move.

Further, when the crane is moved, the clamp body is separated from the side surface of the rail head by the release means. The crane can then move freely.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3 of the accompanying drawings.

Fig. 1 is a front view of the device of this embodiment, and Fig. 2 is the - of Fig. 1.
(2) Cross-sectional view, FIG. 3 is a (2) cross-sectional view in FIG.

Note that in FIGS. 1 to 3, parts common to the conventional apparatus shown in FIGS. 4 and 5 are given the same reference numerals.

In the figure, a frame 10 supported on a crane running rail 1 by wheels 9 is connected to a crane 13 via pins 14.

A holder 3 having support parts 3a and 3b extending along the side surface of the head of the rail l is attached to the crane 10. A groove is formed on the opposing inner surfaces of the supporting parts 3a and 3b, and the clamp body 2a,
2b is retained. The clamp bodies 2a, 2b are the second
As shown in the figure, from both sides of the holder in the longitudinal direction of the rail 1, the side surface of the head of the rail l and the support part 3 are
It consists of two wedge-shaped members that fit into the space between a and 3b. Therefore, the supporting parts 3a, 3b and the clamp bodies 2a, 2b are capable of relative sliding movement within a certain range on their wedge-shaped surfaces, and when the above range is exceeded, the clamp bodies 2a, 2b
Detection force acts on one of the rails b, so that the clamp body strongly grips both sides of the rail head.

The clamp bodies 2a, 2a and 2b, 2b have pins 7a, 7a and 7b, 7 at the rear end on each side of the rail.
b, on which levers 5a, 5a and 5b, 5b are provided.
is connected at one end. The levers 5a, 5a and 5b
, 5b are connected at their other ends via pins lla and llb to form a toggle mechanism. lever 5a,
Pins 8a and 8 are provided in the intermediate portions of 5a and 5b, respectively.
a, 8b, and 8b are provided, and a tension spring 4 is stretched between each of them. Furthermore, pin lla,
llb is provided with a beam 6 that connects the two, and a hydraulic cylinder 22 is provided between the pin 12 in the middle of the beam 6 and the frame 10. The hydraulic cylinder 22 is connected to a hydraulic unit 28, which is a hydraulic power source on the frame 10 and operates the hydraulic cylinder 22. Note that the spring 4 may be provided not only between the pins 8a and Bb but also between the pins 7a and 7b or between the clamp bodies 2a and 2b.

The apparatus of this embodiment having such a configuration operates in the following manner.

(A) When the Crane Stops Traveling When the crane stops traveling and fixes its position, the hydraulic cylinder 22 is extended and the pin 11 is brought to the raised position. Then, the pair of clamp bodies 2a, 2a and 2b, 2b on both sides of the rail are pulled together along the rail, and the support parts 3a, 3b of the holder 3 are pulled together.
This makes it come into contact with the side of the rail. Even if the crane tries to move in any direction in this state, the clamp bodies 2a and 2b on both sides of the rail in that direction will receive a force between them and the support surface of the holder 3, and will not be able to press against the side of the head of the rail 10. grips this and increases the clamping force.

The position of the crane is thus reliably fixed. In addition,
In the initial state of the spring 4, the clamp bodies 2a, 2a
2b, 2b functions to be held in a position where it lightly contacts the side surface of the head of the rail 1.

(B) When the crane is traveling When the crane is moved from the above-mentioned stop position, the above-mentioned hydraulic cylinder 22 is operated in the retracting direction to bring the pin 11 to the lowered position, thereby forming pairs in the longitudinal direction of the rail. The clamp bodies 2a, 2a and 2b, 2b become separated from each other against the force of the spring 4. Since the separation movement is made along the wedge-shaped support surface of the holder 3, each of the pair of clamp bodies 2a,
2a, 2b, and 2b are spaced apart from the side surface of the head of the rail l. As a result, the crane can move freely.

〔Effect of the invention〕

As described above, according to the present invention, the rail is clamped using the imitation effect, so even if the crane tries to move when the crane stops traveling, the more the crane tries to move, the more the clamp body grips the rail. This will securely secure the crane and improve its reliability. Moreover, since only a small mechanism is required to move the wedge-shaped clamp body in the longitudinal direction of the rail, the apparatus can be made extremely compact.

[Brief explanation of the drawing]

FIG. 1 is a front view of an apparatus according to an embodiment of the present invention, and FIG.
3 is a sectional view taken along line II-II in the figure, FIG. 3 is a sectional view taken along
FIG. 1...... Crane traveling rails 2a, 2b... Clamp body 3...
......Holder 3a, 3b...
・・Support part

Claims (1)

[Scope of Claims] A rail clamp device provided on a frame connected to a crane and supported by wheels running on a crane travel rail, comprising: a holder having a pair of support portions facing both sides of the head of the rail; , a clamp body located between each support part of the holder and the side surface of the rail head and held by the holder, and the support parts and the clamp body of the holder are configured to prevent the holder from moving along the rail when the crane stops traveling. The clamp body is formed with an inclined engagement surface that generates a wedge force that presses the clamp body against the side surface of the rail head when the crane moves. A rail clamp device characterized by being connected to a release means for separating the rail head from the side surface of the rail head.